Announce the Factions rules

The rules have been published for a few weeks, but have not been announced yet. I would argue that players can't be "expected" to follow the rules until they are formally announced so all players can be aware of them. Also consider adding a notification to chat for players that aren't in/less active in Discord. I think most players have been playing as if the rules are in effect, but it would still be good to remove any ambiguity here.